/*******************************************************************************
 * The MIT License
 * 
 * Copyright (c) 2012 540951
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ******************************************************************************/
package org.scapdev.content.util;

import gov.nist.scap.content.shredder.parser.IEntityComparator;

import java.io.IOException;
import java.util.List;

import org.apache.xmlbeans.XmlOptions;
import org.custommonkey.xmlunit.DetailedDiff;
import org.custommonkey.xmlunit.Diff;
import org.custommonkey.xmlunit.Difference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.SAXException;

public class EntityComparator implements IEntityComparator {

	private Logger log = LoggerFactory.getLogger(EntityComparator.class);
	
	
	public gov.nist.scap.content.shredder.parser.IEntityComparator.STATUS compareEntities(
			gov.nist.scap.content.model.IEntity<?> control,
			gov.nist.scap.content.model.IEntity<?> test) {
		XmlOptions xo = new XmlOptions();
		xo.setSaveOuter();
		try {
			Diff d = new Diff(control.getContentHandle().getCursor().getObject()
					.xmlText(xo), test.getContentHandle()
					.getCursor().getObject().xmlText(xo));
			
			if( d.identical() ) {
				return STATUS.IDENTICAL;
			} else if( d.similar() ) {
				return STATUS.SIMILAR;
			} else {
				DetailedDiff dd = new DetailedDiff(d);
				List<?> l = dd.getAllDifferences();
				log.warn("Difference found:");
				for( Object o : l ) {
					log.warn(((Difference)o).getDescription());
				}
				return STATUS.DIFFERENT;
			}
		} catch (SAXException | IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return null;

		
	};
}
